Description: The version of the Hammerklavier was prepared by a curator at the Library of Congress, initially intended as a guide through the structural thicket of this gigantic opus, it also turns out to be an extremely revealing expansion of our musical horizons. The extended polyphonic passages quite naturally profit from the new opportunities offered by ensemble playing: the canon at the beginning of the development section in the first movement or the mighty fugue in the finale. The simpler overture transcriptions are anonymous from the 19th century. Leipzig String Quartet, Peter Michael Borck (viola).